add test cases for coin selection

3 files changed, 201 insertions, 0 deletions

diff --git a/src/types.ts b/src/types.ts
index 8f24fda90..f6458955b 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -559,3 +559,10 @@ export interface CheckRepurchaseResult {
 export interface Notifier {
   notify(): void;
 }
+
+/**
+ * For terseness.
+ */
+export function mkAmount(value: number, fraction: number, currency: string): AmountJson {
+  return {value, fraction, currency};
+}
diff --git a/src/wallet-test.ts b/src/wallet-test.ts
new file mode 100644
index 000000000..144b2054c
--- /dev/null
+++ b/src/wallet-test.ts
@@ -0,0 +1,193 @@
+import {test, TestLib} from "testlib/talertest";
+import {mkAmount} from "./types";
+import * as wallet from "./wallet";
+
+
+test("coin selection 1", (t: TestLib) => {
+  let cds: any = [];
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 5, "EUR"),
+    },
+  });
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 0, "EUR"),
+    },
+  });
+
+  let res = wallet.selectCoins(cds, mkAmount(2,0,"EUR"), mkAmount(0,5,"EUR"));
+  if (!res) {
+    t.fail();
+    return;
+  }
+  t.assert(res.length == 2);
+  t.pass();
+});
+
+
+test("coin selection 2", (t: TestLib) => {
+  let cds: any = [];
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 5, "EUR"),
+    },
+  });
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 0, "EUR"),
+    },
+  });
+  // Merchant covers the fee, this one shouldn't be used
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 0, "EUR"),
+    },
+  });
+
+  let res = wallet.selectCoins(cds, mkAmount(2,0,"EUR"), mkAmount(0,5,"EUR"));
+  if (!res) {
+    t.fail();
+    return;
+  }
+  t.assert(res.length == 2);
+  t.pass();
+});
+
+
+test("coin selection 2", (t: TestLib) => {
+  let cds: any = [];
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 5, "EUR"),
+    },
+  });
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 0, "EUR"),
+    },
+  });
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 0, "EUR"),
+    },
+  });
+
+  let res = wallet.selectCoins(cds, mkAmount(2,0,"EUR"), mkAmount(0,2,"EUR"));
+  if (!res) {
+    t.fail();
+    return;
+  }
+  t.assert(res.length == 2);
+  t.pass();
+});
+
+
+
+test("coin selection 3", (t: TestLib) => {
+  let cds: any = [];
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 5, "EUR"),
+    },
+  });
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 0, "EUR"),
+    },
+  });
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 5, "EUR"),
+    },
+  });
+
+  let res = wallet.selectCoins(cds, mkAmount(2,0,"EUR"), mkAmount(0,2,"EUR"));
+  if (!res) {
+    t.fail();
+    return;
+  }
+  t.assert(res.length == 3);
+  t.pass();
+});
+
+
+test("coin selection 3", (t: TestLib) => {
+  let cds: any = [];
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 5, "EUR"),
+    },
+  });
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 0, "EUR"),
+    },
+  });
+  cds.push({
+    coin: {
+      currentAmount: mkAmount(1, 0, "EUR"),
+    },
+    denom: {
+      value: mkAmount(1, 0, "EUR"),
+      fee_deposit: mkAmount(0, 5, "EUR"),
+    },
+  });
+
+  let res = wallet.selectCoins(cds, mkAmount(4,0,"EUR"), mkAmount(0,2,"EUR"));
+  t.assert(!res);
+  t.pass();
+
+});
diff --git a/tsconfig.json b/tsconfig.json
index 54ec05ca8..2002012d0 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -28,6 +28,7 @@
     "src/types-test.ts",
     "decl/chrome/chrome.d.ts",
     "src/cryptoWorker.ts",
+    "src/wallet-test.ts",
     "src/db.ts",
     "src/emscriptif.ts",
     "src/helpers.ts",